One-atom-layer 4×4 compound in (Tl, Pb)/Si(111) system

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• 作者：A.N. Mihalyuk^a ; ^b ; C.R. Hsing^c ; C.M. Wei^c ; D.V. Gruznev^a ; L.V. Bondarenko^a ; A.Y. Tupchaya^a ; A.V. Zotov^a ; ^b ; ^d ; A.A. Saranin^a ; ^b ; ^{saranin@iacp.dvo.ru}
• 关键词：Silicon ; Thallium ; Lead ; 2D compounds ; Scanning tunneling microscopy ; DFT calculations
• 刊名：Surface Science
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：657
• 期：Complete
• 页码：63-68
• 全文大小：1698 K
• 卷排序：657

文摘

Upon Pb deposition onto Si(111)1×1-Tl surface, Pb atoms substitute Tl. When about 0.7 ML Pb is adsorbed, 2D Si(111)4×4-(Tl, Pb) compound is formed. The compound plausibly contains 9 Tl atoms and 12 Pb atoms per 4×4 unit cell. Based on DFT calculations, model of the 4×4-(Tl, Pb) structure is proposed. The structure has a C3 symmetry and occurs in the two equivalent orientations.